Fluid pump



April 9, 1935. H.' Ji LE vr-:scoN'rE FLUID PUMP Filed July 11', 1932 2SheetsfSheet l April 9, 1935 H. J. LE vvEscoN-n 1,997,370

FLUID PUMP Filed July 11, 1932 2 Sheets-Sheet 2 97 r cgtg 9 y J' NW" l25m l (9\A w i Patented Apr. 9, 1.935 l UNITED STATESy PATENT OFFICEFLUID PUIVIP Harold J. Le Vesconte, Chicago, Ill., assgnor to UnionSpecial Machine Company, Chicago, Ill., a corporation of IllinoisApplication July 11, 1932, Serial No. 621,971

111 Claims. (Cl. 103-126) The invention relates to new and usefulimfluid pump includes a central casing member I provements in fluidpumps, and more particwhich has a projecting bracket portion 2 formedularly to a fluid pump having interengaging imwith bolt holes 3 throughwhich bolts may be pellers. placed for securing the pump casing rigidlyto a 5 -An object of the invention is to provide a fluid supportingmeans. Within the central member 5 pump of the above type with means forinterof the pump casing is a chamber 4. the end Walls mittently rotatingthe impellers. f 5 and 6 of which are circular and curved about Afurther object of the invention is to procenters 'I and 8, respectively.The bottom and vide a pump of the above type wherein the extop Walls ofthis chamber may be of any suitable tent of intermittent movementimparted to the shape. Located within this chamber are interlo impellersmay be varied for varying the transmeshing impellers 9 and I0. Theimpellers are mitting capacity of the pump without varying similarlyconstructed. Each impeller has a centhe speed of the prime movertherefor. tral opening II therethrough and is provided with In thedrawingsintermeshing projections I2 operating as pistons.

l5 Figure 1 is a iront view of a pump embodying The projections have theends thereof curved 15 the improvements and showing in particular the toconform to the curvature of the end walls 5 operating mechanismtherefor; and 6 as indicated at I3. When the impellers are Fig. -2- is asectional view on the line 2 2 of placed and intermeshed, the drivingimpeller I0 Fig. l; contacts with the end wall B and the driven im- Fig.3 is a vertical sectional view through the P61181' 9 Contacts With theend Wall 5- 20 pump at right angles to the axis of rotation of Locatedwithin the driving impeller is a shaft the impellers; I4 carrying ablock I5 which has flat sides indi- Fig. 4 is a sectional view on theline 4 4 of cated at I6 forming the sides of an equilateral Fig-1;triangle. The corners of the triangle are cut Fig. 5 is a sectional viewon the line 5 5 of away `forming curved faces I1. These curved 25 Fig-1; faces conform to the inner curved surface of the, Fig. 6 is aperspective view of one of the imimpeller annulus. The shaft I4 extendsthrough DEHEIS; the impeller I Il and is mounted for rotation in Fig. 7is a perspective view of one of the bearings in the pump casing. Thepump casing clutch members for intermittently rotating the not onlyincludes a central Casing member l, but 30 y impellers; and side casingmembers I8 and I9. These side cas--l Fig. 8 is an enlarged View partlyin side eleing members contact with the central casing vation and partlyin section showing one of the member and are secured together by a bolt20. l

impellers and its associated operating clutch. The Side Casing membersare DIOVided With The invention is directed to a fluid pump for bossesin the region of the bearings for the shaft 35 transmitting fluids andincludes a casing prosupporting the clutch member. Between the videdwith a chamber, in which casing is loblock I5 and the inner surface ofthe impeller -cated for rotation impellers which are interare clutchrollers 2|. There is one clutch roller meshed and which divide thechamber so as to for each fiat side of the block. The flat side provideintake and discharge sections. Each of the block has a groove 22 formedtherein and 40 impeller is in the form of an annulus. lLocated attachedto the block and lying in the groove within each impeller is a clutchmember. One beneath the roller 2| is a spring 23. This spring of theimpellers is a driving impeller, and the iS so shaped as to normallyhold the roller pressed clutch member 'therefor is intermittentlyoperagainst the inner face of the impeller.

ated for rotating the impellers. The other im- On the end of the shaftI4 is an arm 24 pro- 45 peller is a driven impeller and the clutchmemvided with a slot 25. Adjustable in the slot 25 ber therein is forthe purpose of preventing retis a stud 26 to which a link 21 isattached. This rcgrade movement of the impellers. The clutch link ispivoted at 28 to a rock lever 29 which in member is intermittentlyoscillated and imparts turn is pivotally mounted at 30. An eccentric acontinuous intermittent forward movement to strap 3| is pivoted at 32 toa rock lever and co- 50 the impellers. Means is provided whereby theoperates with the eccentric 33 on the shaft 34 throw of the clutch maybe varied so as to vary which is the prime mover for operating the pump.the length of the intermittent movement given As this shaft rotates, itwill, through the train 01 to the impellers. Y mechanism described,oscillate the shaft I4.

Referring more in detail to the drawings, the When the shaft I4 is movedin a clockwise direc- 55 mittent movement given to the impellers.

tion, the roller will be caused to grip the impeller i and will impartrotating movements thereto to an extent depending upon the extent ofoscillation of the arm 24. When the arm is oscillated in the oppositedirection, the clutch is released from the impeller which remainsstationary while the clutch is returned for a new gripping hold on theimpeller i0. There is a similar clutch 35 with rollers and springslocated within the impeller 9. The shaft 36 carrying this clutch is xedto the end vmembers of the casing by nuts 31 and 38 which servethe-double function of pre. venting the shaft from rotating, and tightlyjoining the end sections of the casing to the central section thereofFrom the above it will be apparent that the impellers are mounted forintermittent rotation in the casing and have a bearing contact with thecurved faces of thecasing. They also have a bearing contact withthelblocks of the clutch members and at one time the driving impellermoves with the .clutch block -while at another time it rotates on theclutch block. The driven impeller rotates on the xed clutch blockassociated therewith which is stationary fand which prevents theimpeller from any retrograde movement. This provides a means whereby theimpellers are intermittently rotated in aA forward direction. Byadjusting the stud 26 the extent vof movement of the clutch blockdrivingthe pump canbe vvaried and this will vary the inter- The sidemembers of the casing are provided with openings therethrough which arein alinement. A cap nut 40 may be threaded into one of these openingsfor closing the same, and a pipe #Si attached to the other by a suitablecoupling. This pipe may serve as an intake pipe for the pump, in whichcase the uid will be drawn into the pump at the lower section of thecasing which is divided by the impellers into an intake section and adischarge section. The side members of the casing lare also providedwith openings, one of which may be closed by cap nut 42 and the pipe 43attached to the other by a suitable coupling which willserve as adischarge pipe for the discharge side of the pump. These cap nuts 42 areinterchanged with the pipes and the upper pipe may be made an intakepipe and the lower one a discharge pipe if the pump is rotated in theopposite direction. The two shafts on which the clutch devices a'ndgears are supported may be turned end for end in the casing, and thiswill reverse the direction of rotation of' the impellers. The operatingelements of the pump can be shifted, making the other impeller a drivingimpeller, or so as to place the operating arm on the other side of thepump. -This greatly facilitates the installing of the pump with minorchanges in the machine with which it is associated. The

pump is simple in construction, consisting of few parts, and even whenoperated at highl speeds the parts are subject to little wear.

The pump is especially adapted for the supplying of oil to a high speedmachine such as a sewing machine wherein the prime moving shaft may berotating from 4,000 to 5,000 R. P. M.. One of the problems in a highspeed'machine is to reduce the supply of'a pump 'to the requirements ofthe machine. The pump which has just been described Amay be driven athigh speed and the amount of oil delivered reduced to a very smallamount, due to the fact that for each rotation of the prime mover a verysmall movement may be given to the impellers. Furthermore, the exequallyas well for other purposes where the amount of fluid transmitted isrelatively small and theconditions are such that the prime moveroperating the pump is a high speed part.

it is obvious that other forms of intermittently rotating impellers maybe used than those described in detail and that the clutches may beotherwise placed relative to the impellers and the casing, andfminorchanges made in the details of construction without departing from thespirit of the invention as set forth in the appended claims.

Y Having thus described the invention, what ilv claim las new and desireto secure by Letters Patent, is-

1. A fluid pump comprising a casing having a pump chamber therein, arotatable impeller and means cooperating the ewith for dividing saidchamber into intake and discharge sections, an operating shaft extendingthrough said impeller, clutch meanslocated within the pump chamber forintermittently operating said impeller from said shaft for transmittingfluid from the intake to the discharge side of the chamber,said clutchmeans andshaft constituting the sole means for.

rotating said impe1ler,'a.nd means for restraining the impeller fromretrograde movement whereby the impeller is driven when said shaft isrotated in one direction and is stationary when said shaft is rotated inthe other direction. V 1

2. A iiuid pump comprising a casing having a pump chamber therein, arotatable impeller and means cooperating therewith for dividing saidchamber into intake and discharge sections, an' Aoperating shaftextending through said impeller,

3. A uid pump comprising a. casing having aI pump chamber therein, arotatable impeller and means cooperating therewith for dividing saidchamber into intake and discharge sections, anI operating shaftextending through said impeller; means located within the pump chamberfor intermittently operating said impeller from said shaft fortransmitting uid from the intake to the discharge side of the chamber,and devices operating upon said cooperating means for restraining theimpeller from retrograde movement.

4. A fluid pump comprising a casing, a pump chamber therein,intermeshing rotatable impellers located within said pump chamber anddividing said chamber into intake and discharge sections, an operatingshaft extending through one of said impellers, clutch means'locatedwithin the pump chamber for intermittently rotating said impellersfromsaid operating shaft for transmitting fluid from the intake to thedischarge side of said chamber, said clutch means and shaft constitutingthe sole means for rotating the impellers, and means for restraining theimpellers from retrograde movement whereby theimpellers are driven whensaid shaft is rotated in one direction and are stationary when saidshaft is rotated in the other direction.

5. A uid pump comprising a casing, a pump chamber therein. intermeshingrotatable impellers located within said pump chamber and dividing saidchamber into intake and discharge sections, an operating shaft extendingthrough one of said impellers, means located within the pump chamber forintermittently rotating said impellers from said operating shaft fortransmitting fluid yfrom the intake to the discharge side of saidchamber, a stationary shaft extending through the other of saidimpellers, and means within the pump chamber disposed between saidstationary shaft and the impeller associated therewith for restrainingsaid impellers from retrograde movement.

6. A fluid pump comprising a casing having a pump chamber therein,rotatable intermeshing impellers located in said pump chamber anddividing said chamber into intake and dischargev sections, an operatingshaft extending'through the casing and one of said impellers, clutchmeans located within the impeller associated with the operating shaftfor intermittently rotating said 'impellers from said shaft, said clutchmeans and shaft constituting the sole means for rotating the impellers,and means for restraining the impellers from retrograde movement wherebytheimpellers are driven when said shaft is rotated in one direction andare stationary when said shaft is rotated in the other direction.

7. A fluid pump comprising a casing having a pump chamber therein,rotatable intermeshing impellers located in said pump chamber anddividing said chamber into intake and discharge sections, an operatingshaft extending through the casing and one of said impellers, meanslocated within the impeller associated with the operating shaftforintermittently rotating said impellers from said shaft, a stationaryshaft extending through the other impeller, and means located withinsaid last-named impeller and cooperating with said stationary shaft forrestraining the impellers from retrograde movement.

8. IA uid pump comprising a casing,` a chamber therein, ,intermeshingannular impellers contacting with the end wallsof the casing anddividing said chamber into intake and discharge sections, a clutchlocated within one of said impellers for intermittently rotating thesame, and

cooperating therewith for preventing retrograde movement of saidimpeller.

9. A fluid pump comprising a casing having a central section and sidesections secured thereto and forming a chamber, a shaft mounted in saidside sections, an impeller mounted on said shaft and having the ends ofthe shaft shaped to conform to and contact with the end wall of thecasing, a second impeller meshing with the firstnarned impeller andhaving its shaft contacting a clutch `located within the other impellerand with the opposite end wall of the casing, a shaft on which saidsecond impeller is mounted, means for securing said last-named shaft ina fixed position, a clutch carried by said shaft and cooperating withthe impeller mounted thereon for preventing retrograde movement therein,a clutch carried by the first-named shaft and cooperating with theimpeller thereon for intermittently rotating the same, and means foroscillating said first-named shaft.

10. A fluid pump comprising a casing having a. chamber therein formedwith curved end walls, intermeshing annular impellers located in saidchamber and contacting with the respective end walls. a shaft extendingthrough one of said impellers and xed to said casing, a clutch locatedwithin said impeller and cooperating with said shaft for preventingretrograde movement of the impcller, a second shaft mounted foroscillation in said casing and extending through the other impeller, aclutch located within said last-named impeller and cooperating withsaidshaft for intermittently rotating said impellers, an arm carried by saidlast-named shaft, and means connected to said arm for oscillating theshaft.

11. A fluid pump comprising a casing having a chamber therein formedwith curvedend walls, intermeshing annular impellersk located in saidchamber and contacting with the respective end walls, a shaft extendingthrough one of said impellers and fixed to said casing, a clutch locatedwithinsaid impeller and cooperating with said shaft for preventingretrograde movement of the impeller, a second shaft mounted foroscillation in said casing and extending through the other impeller, aclutch located within said lastnamed impeller and cooperating with said'shaft for intermittently rotating said impellers, an arm carried bysaid last-named shaft, means connected to said arm for oscillating theshaft, and means whereby the extent of movement imparted to said arm maybe varied.

HAROLD J. LE VESCONTE.

